652621940909 has 2 divisors, whose sum is σ = 652621940910. Its totient is φ = 652621940908.

The previous prime is 652621940843. The next prime is 652621940921. The reversal of 652621940909 is 909049126256.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 652419675625 + 202265284 = 807725^2 + 14222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-652621940909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652621940939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326310970454 + 326310970455.

It is an arithmetic number, because the mean of its divisors is an integer number (326310970455).

Almost surely, 2^652621940909 is an apocalyptic number.

It is an amenable number.

652621940909 is a deficient number, since it is larger than the sum of its proper divisors (1).

652621940909 is an equidigital number, since it uses as much as digits as its factorization.

652621940909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 652621940909 in words is "six hundred fifty-two billion, six hundred twenty-one million, nine hundred forty thousand, nine hundred nine".